A Passive analytical per-unit-length internal impedance matrix model for multiconductor interconnections

Based on multiconductor transmission line (MTL) theory, we describe a technique for a simple computation of the high-frequency (h.f.) current distribution in a multiconductor interconnection and of the h.f. per-unit-length (p.u.l.) resistance matrix of the interconnection. This result is used in a model for the p.u.l. internal impedance matrix of the interconnection. We show that this model is passive, hence causal.